CC Spyder ... Chassis not very rigid?

I'm currently driving a SL55 and am looking at getting into a Maserati Spyder... I'm focusing on 2004 CC models and have noticed that in '03 the Spyder's received a 20% increase in chassis stiffening so that the body doesn't flex as much.. However, my question is -- How rigid is the '04 Spyder body? Will the chassis flex when going over bumpy roads? Is there a lot of cowl shake? What about comparisons to a 911 (997 model), Mercedes SL, and BMW M3 convertibles? I HATE cowl shake as it makes a car feel cheap... So what are your opinions on those who have driven the spyder and any of its competitors?


Thanks ahead..